Binding for Maxim MAX77686 regulators
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This is a part of the device tree bindings of MAX77686 multi-function device.
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More information can be found in ../mfd/max77686.txt file.
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The MAX77686 PMIC has 9 high-efficiency Buck and 26 Low-DropOut (LDO)
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regulators that can be controlled over I2C.
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Following properties should be present in main device node of the MFD chip.
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Optional node:
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- voltage-regulators : The regulators of max77686 have to be instantiated
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under subnode named "voltage-regulators" using the following format.
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regulator_name {
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regulator-compatible = LDOn/BUCKn
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standard regulator constraints....
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};
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refer Documentation/devicetree/bindings/regulator/regulator.txt
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The regulator node's name should be initialized with a string
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to get matched with their hardware counterparts as follow:
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-LDOn : for LDOs, where n can lie in range 1 to 26.
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example: LDO1, LDO2, LDO26.
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-BUCKn : for BUCKs, where n can lie in range 1 to 9.
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example: BUCK1, BUCK5, BUCK9.
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Regulators which can be turned off during system suspend:
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-LDOn : 2, 6-8, 10-12, 14-16,
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-BUCKn : 1-4.
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Use standard regulator bindings for it ('regulator-off-in-suspend').
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LDO20, LDO21, LDO22, BUCK8 and BUCK9 can be configured to GPIO enable
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control. To turn this feature on this property must be added to the regulator
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sub-node:
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- maxim,ena-gpios : one GPIO specifier enable control (the gpio
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flags are actually ignored and always
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ACTIVE_HIGH is used)
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Example:
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max77686: pmic@9 {
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compatible = "maxim,max77686";
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interrupt-parent = <&wakeup_eint>;
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interrupts = <26 IRQ_TYPE_NONE>;
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reg = <0x09>;
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voltage-regulators {
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ldo11_reg: LDO11 {
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regulator-name = "vdd_ldo11";
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regulator-min-microvolt = <1900000>;
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regulator-max-microvolt = <1900000>;
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regulator-always-on;
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};
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buck1_reg: BUCK1 {
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regulator-name = "vdd_mif";
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regulator-min-microvolt = <950000>;
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regulator-max-microvolt = <1300000>;
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regulator-always-on;
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regulator-boot-on;
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};
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buck9_reg: BUCK9 {
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regulator-name = "CAM_ISP_CORE_1.2V";
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regulator-min-microvolt = <1000000>;
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regulator-max-microvolt = <1200000>;
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maxim,ena-gpios = <&gpm0 3 GPIO_ACTIVE_HIGH>;
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};
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};
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